combined with scraper or collector box

Industry

  • CPC
  • E21C27/42
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Patents Grantslast 30 patents

  • Information Patent Grant

    2577924

    • Patent number 2,577,924
    • Issue date Dec 11, 1951
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1704918

    • Patent number 1,704,918
    • Issue date Mar 12, 1929
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    A CUTTING HEAD ASSEMBLY

    • Publication number 20240309761
    • Publication date Sep 19, 2024
    • OPTIMA MINING SYSTEMS PTY LTD
    • Benjamin Charles Michael BROWN
    • E21 - EARTH DRILLING MINING